Accession Number:

ADA046831

Title:

RF Attenuation Measurement System Using a SQUID,

Descriptive Note:

Corporate Author:

NATIONAL BUREAU OF STANDARDS BOULDER COLO ELECTROMAGNETICS DIV

Report Date:

1977-09-01

Pagination or Media Count:

157.0

Abstract:

This report describes a unique portable system for measuring attenuation at 30 MHz over a range of 50 dB to an accuracy of 0.005 dB per 20 dB. This system does not require any reference standard. A SQUID Superconducting Quantum Interference Device with its associated instrumentation is used to determine attenuation in terms of Bessel Function Zeros. A SQUID is a loop of superconducting metal closed by a weak point contact called a Josephson junction, operating in liquid helium. The system specifications, description, and theory of operation are presented. A complete system operating procedure including data reduction techniques is given along with a discussion of sources of errors. Considerable additional information and diagrams are presented as an aid to the user in understanding and operating the system. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE